0 Fermilab TS-SSC 92-022

SSC Collider Dipole Magnet End Force Issues

Wayne Koska Fermilab

January 21, 1992

Outline:

• End Force Measurement Variations

• Fermilab 50 mm Dipole End Design

• Construction Variations which might affect end force

• Conclusions

AcknQwledgments: Jim Strait Steve Delchamps Rodger Bossert Tricia Heger

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203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236

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c D E F G

Average End Force vs. 1**2 (Pre-load Subtracted)

10.00 ~ I I I I I I is1opes (kN/kA **2) I 9·00 1-f ocA311: 0.031 -

8.00 ~DCA312: 0.097 -

7.00 1 rDCA207: 0.140 -

6.00 d I I I 7~/tc'A312 I I s.oo q I · I J,~~ d:t-·/:f I 4.00 j I I 7K ~/ ~

3.00

2.00 DCA311

1.00 I i<'/_s

0.00 I

0.00 10.00 20.00 30.00 40.00 50.00 60.00

I Current*~ (k~2_)_1

H

E)DCA311 TC1

+ DCA311 TC2

®ocA312 TC1

B DSA324 TC1

A OSA324 TC2

A DSA324 TC4

'V- DSA326 TC1

'V- DSA326 TC2

~ DSA101 TC1

~ DSA101 TC2

• DSA102 TC1

$- DSA102 TC2

@) DCA207

& DSA209

S DSA210

& DCA313 TC1

B I c I D I E I F

: I DCA311 End Force vs 1"*2 !

90 91 92 93 94 95 96 97 98 99

100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

O.> u L­o u... -

15.00 .....,_~----.----...---......... ---...-------..-----. :

14.00 .....,_:t------+----+-----+---+-----+-----i -: 13.00-_:t------+----+-----+----+-----+-----i

= 12.00 -_+-----+---+-----+----+-----+----!

= 11.00~~~ = 10.00 -

:... -9.00 - .

8.00 -= ' ___..~

7.00 -- I

= 6.00 -_-+------+---+----+----+-----+---! :

5.00 .....,_:t------+----+----+---+----+-----f :

-4.00 .....,_:t-----+---+-----+----+-----+---1 = 3.00 .....,::r----+----+-----+---+-----+---1 :

2.00 ......,:+-----+---+-----+----+-----+----! :.

1.00-_+-----+---+--~-4--~-+-----+----1

= 0.00 - I I I I I I I I I I I I I I I I I I I I I I I I

0.00 10.00 20.00 30.00 40.00 50.00 60.00

I Current .. 2 (kA .. 2) I

I G

* Bullet 1

e Bullet 3

B Bullet 4

I

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

BD I BE I BF I EG I BH I BI

I DSA101 End Force vs 1**2

J L \)10.00 -

-\- <l! 9.00 -':) u d ;;. 8.00 - 0 -

lj\ j v 7.00 ~ ~ -<:t- ,11 H 6.oo _

5.00 - -,..... 4 .00 z -~ 3.00

Q) -u 2.00 '-0 -LL. 1.00

.....___ -0.00 -· -1.00

--2.00 --3.00 --4.00 -·5.00 I I I I I I I I I I I I I I I I I I I I I I I I

0.00 10.00 20.00 30.00 40.00 50.00 60.00

I Current**2 (kA .. 2) j

*Bullet 1

9 Bullet 3

El Bullet 4

l It

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

Ci I Cl I CJ ac I a. I CM

-........ z .::,,{.

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.__

16.00 ----14.00 ----12.00 ----10.00: ~J- ~;..-::::~~

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8 .00 ~I - -~r

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6.00 _ .. ----

4.00 -+---t-----+----+-----1r-----+------t ----2 .00 --------------------------, 0 .00 I I I I I I I I I I I I I I I I I l I I I I I I

o.oo 10.00 20.00 30.00 40.00 50.00 60.00

j Current*"2 (kA "*2) I

+Bullet 2

9 Bullet 3

8 Bullet 4

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 1 1 1 112 113 114

CB

<l> u '-0

LI...

cc CE CF

I DCA207 End Force vs 1**2

35.00 --r---~--........ ---~-----.-----,-----, 34.00 --t-----t----+----t----+----t------1

33.00 --t-----t----+----+----+----t------1 32.00 -+-----+----4-----+----+--..,..,.... 31.00 -+---+-----+---+-----t:~~ mlf----1

30.00 -+---+-----+---+-.,e~~~--+-----1

29.001===t==:t~i~r::J~~li~!:=J 28.00 -27.00 -+---+--:7"'!~?4.l------:::~~,,,c~:;.__--+------l 26.00 -+-----:77!~..c;...;;;;=-.--+-?""'::;,.i_~~,...:;....---+---+-----I

25.00 --b~1'1"'---+---;;~-=i,:=...~~+-----+---+-----I

24.00 --P'---~~~~,...q..:......._ __ +----l----+------1 23.00 -+----:0~"7-"Y..:::;..._---+---+----l----+------I 22.00 --fi..,...;..;t:;....-+-----+---+-----+----+------1 21.00 -+----+------+----+-----+----+-----!

20. 00 -t--i--T"""T--.---t-ir-T"-r-r-+--r-...---r--r--+-.r--T""-r-.......+--r-.......... --r--+-,........,..-r-...-!

0.00 10.00 20.00 30.00 40.00 50.00 60.00 :V'cJ-t'-2- I Current**2 (kA**2) I f 1~-l ec...Jl

*Bullet 1

+Bullet 2

9 Bullet 3

8 Bullet 4

• 90 91 92 93 94 95 96 97 98 99

100 101 102 103 104 105 106 107 108 109 110 111 11 2 113 114

N I 0 I P I Q I R I S

~

z ~

d> 0 '-0

LI...

-

I DCA312 End Force vs 1 .. 2

15.00 ~-~----r----.----..-----r-----r-------. =

14.00 ~:T------+----+----+-----+----+-----1 :

13.00 ~-T------+----+----+-----+----+-----1 :

12.00 ~-T------+----+----+-----+----+----1 =

11.00 -::::r-----t----+----t-----+--~~-----t = ~

10.00 - ~"'""' ~ = ~~ 9 .00 = ~ ~ r"""l--E 8.00 ~ -~Y"""~ ~~ 7.00 - ..... = ,-..,. 6.00 : ~,... ,,, __ ·~

S.00 =~~-4.00 :]......, _

= 3 .00 -:::T------+----+----+-----+-- --+------i =

2.00 -:::'.1------t----+----+-----+----+------i = 1.00 -::::r--- --t----+----+-----+----+------i =

0.00 - I I I I I I I I I I I I I I I I I I I I I I I I

0.00 10.00 20.00 30.00 40.00 50.00 60.00

I Current"*2 (kA0 2} I

* Bullet 1

+ Bullet 2

6 Bullet 3

B Bullet 4

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

--z ~

<l> u L.. 0

l.J..

I DSA209 End Force vs 1 .. 2

15.00 ~-,,...-----.------.----~----..----r------. :

14.00 -:-+---------------~----+-------! :

13.00 -_-t------+----+----+----+----t----i

= 12.00 -_-1------+----+----+----+----+----i

= 11 .00-_-r-------------+----+---------::

10.00-_-r-----+---------t----+----+-----I

= ~ 9.00 ~=±----f----+---+----+----,....-+------..,,,..~_"'"--1 : 3"

8.00 ....;-~---f----+---+----+-1-~---::::.....,:i;-4-------1 : ~r-t:.J

7.00 ....;;_~---1----1----+.~---,,.j-~~:::;._--1-----::1. ~ = ~~ ~~

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2.00= 11 ..-.i:~ - VT·,•, -~

1.00 -~ -= ff"'-' - '-' 0.00 I I I I I I I I I I I I I I I I I I I I I I I I

o.oo 10.00 20.00 30.00 40.00 50.00 60.00

I Current**2 (kN'*2) I

*Bullet 1

+Bullet 2

9 Bullet 3

8 Bullet 4

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

....... z ;:,,:.

<!.> u (...

0 l.J..

15.00

14.00

13.00

12.00

11.00

10.00

9.00

8.00

7.00

6.00

5.00

4.00

3 .00

2.00

1.00

0.00

I DSA210 End Force vs 1°2

* Bullet 1

+ Bullet 2

9 Bullet 3

0 .00 10.00 20.00 30.00 40.00 50.00 60 .00

I Current .. 2 (kA **2) ! B Bullet 4

T I U I V I W I x I y

I

I I DSA324 End Force vs 1**2 I

90 91 15.00 *Bullet 1

92 -93 13.50

-94 95

12.00

-96 10.SO 97 - -98 z 9.00 +Bullet 2

99 .::,(. -100 <l.>

(.)

101 '-0

102 LL..

-103 104 105 106 107

7.50 ----+-------1--------.....--------l ~l,_....X

6 .00 -_+------lf------1----+--~--+~~___...+~-+-+--~

4.50 - ~~-~-t:J 3.00 ~ _:_=....-I- - ~ "-'

- ~~ - - ..., 1.50 i..--·~ ~~

-

8 Bullet 4

108 -109 0.0 0 ~....,,-~ ,,-,l""'"'T-.,r--r, ..... ,-......-+ 1-,.-,..,, ..... ,---.-1 -+-i,,.......,..., ..... ,-......-+ ,-.......... ,1 ....,1,.......,...1 -t-T""""T ,,- ,.---.-, -I

110 0.00 10.00 20.00 30.00 40.00 50.00 60.00

111 112 113

I Current**2 (kA**2) I B Bullet 3

114

AL I AM I AN I AO I AP I AQ r QJ ! ! ' : • , m;;ii;3"2~··Tc~···---TBu110cr- !Bulliit ... "2-· :Bmrer~- :auirar-3· ... ··--·---f]i;vei'a:;;·9···--···--···--· -.-. ~·····-··········-··-··-·-o:n·~r·········-·-·--,·xt1r········------r:1i·2r-· ~:nt-· .. --··-.. ------;:s-t1i .. -........ ..: .......... -...... 2·:irn

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~~,~···········-·····-···---3"~·:r;4r····-·--······-·--·-4:·37t···-·-·--··---c.flSi----··-----""!·:91t·--··-·--···--···--3:7·1·1-···-·-··········-······-···4-:iH:! ······-··············---4~·,:-3·4r·---·---~'5-~r .. ··---·--0·2i-··---· 4.~~r----... -----·--•ca~1 ................................. 4·:1s

~~-f··························--4~·:i)·3r·---···----s:-r41···-·----···--s:~·gr-·-·--- 474~r·-------··---4:·1:s1 ................................. 5·:ra ·················-··--s-4:r9r------··--~:-04r----·----s:·g·or-·-·-·-----.l'.:'tS4!-·-·····---····· .. --·-s:·r1r··· .. ···························s-:1~·4

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----!o!-..:1 !---l·····················-····--9:~ar---···--·-·----·-2-:-,-gi·-··----·---.. 2·:s·ai.......... a-:-2"2t-.... ---·· .. --........ ~:4~i ..................... -.......... 2·:s·s

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---,!,,,...,.1 ~::::::::::::::::::::::::::::g~g:2r::::::::::::::==~===sf ggf ========::.::::~::2~8:81=:========:=~=~gf ggf.=====::.~:::::::=~~::g~:gg1:::::::::::::::::::::::::::::::::2:~g:g

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___..~, -l·····························--o·:trnr--·---· i':l:"{50T-------o-:i:ror-··--·-------i)":-o·eir--·-·--···-·············6:·li·o:r································o·:cro • ········-·-···-···--···-o·:i)·or·---··-·---6:·oor-·------0:1rc;r·-·-·---·---o~oor---··--·······--·····6:-cr6r·······-·······················o..-cYo

······················--···-·i)·:r1or·--·-····---6:0-01-------·- o:o·or··-·-·-·-----o:()"OT .. -·······-··-·······-o:-trc'.5r .. ·····························crJ1·0

90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 1 1 1 112 113 114

~ ..... z ~

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-

15.00

13.50

12.00

10.50

9.00

7.50

6.00

4.50

3.00

1.50

o.oo

I DSA324 End Force vs 1**2

*Bullet 1

-I Fourth Thermal I

--

+Bullet 2 -

vx -~

- ~ ~ ~ . ~ ~ -- ,... ~

~ ,. ......

7 "11..:.J 8 Bullet 4 -~

~

-I I I I I I I I I I I I I I I I I I I I I I I I

0.00 10.00 20.00 30.00 40.00 50.00 60.00

I Current"*2 (kA**2) I B Bullet 3

OUTER COIL

TAPERED KEYS

BEAM TUBE

INNER COIL

OUTER CYLINDER

/f f () '$ l1.. E!...J. 0- "''

hy J. rG\" I t~oi l~y

COLLAREO COIL ASSEMBLY

OUTER COIL

INNER COIL

}{e'Af1' 0- .... ~

J c.i. ye... ~--s

COLLET QUADRANT

RETURN END Cl.AMP ASSEMBLY

END CAP

BEAM TUBE

.ft. '¥

SSC 50MM COLLARED COIL RETURN END ASSEMBLY FERMI NATIONAL ACCELERATOR LABORATORY

LEAD END

QUARTER COIL VOLTAGETAPS

INSTRUMENTATION WIRES

BULLET GAGE COLLARED COIL ASSEMBLY WITH ENOS

SETSCREW

RETURN END

FILLER YOKE LAMINATIONS EXPANSION LOOP

YOKE LAMINATIONS

SHELL

INSTRUMENTED END PRELOAD SCREWS ' 'BULLET GAGES''

BUS INSULATION COVER

END PRELOAD SCREWS

SHELL EXTENSION

.dt. ~

SSC 50MM COLD MASS ASSEMBLY FERMI NATIONAL ACCELERATOR LABORATORY

') (· ~ .... e s s c1 i"'( ..

p la..t·~

End Clamp Assembly

Bullet Load Slug

.319 .. _J l I -, ~ 38.l mm

.195" Skin

Bu l1 et Gage Assembly Sketch

so mm SSC Col11der Dipole

.tl.2L~~~~I~.

Modlf led 1I16/9 1

53.85 mm

~

Wayne Koska 11-19-90

~~~-m-f ~~::------\ ""'1

Bullets Loaded thru 3/ 4" Bushing Screws

Bushing Screws

\ \ \ \ \

Inside Radius of Skin 165.05 mm

,,,.

Bullet Pressure Plate

Bullets

Load Slug D1ameter =9.Smm

Bullet Load Slug Location Relative to Coil Ends (1/2 Scale)

_/Shell

End can

-~~ , I Inner Co11 End ~,;=·,~<~· 1 (Saddle)

- J f outer Co11 End (Saddle)

1 • !!'>'·\.~ ..,> vF~lJ'""L'-.._ v ·y v 1· 1J>r1 :J '-··T '-'· v ..:-~\. '- •\ ...__,. W ·o .::•r· 9 ... iJQ.Y1.C..h.. .bv·1,c\.vi'a- ,-.·

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-Q. :e c:t --c cu a.. a.. ::I u .c 0 c cu ::I (J

~r,,.._ :To.F~ery I~ - s sc._ 'H ... r 1.r DSA324 QUENCH HISTORY

Mode.) /YI ~!?l"' e. T o.HeA. pr·~.~ loc\rl (,\ /$ o c');,,Qrv e.cl o JI\ f)!V"1-.

tt l t t'\ . '\ ' 'l ~.:t.5' QOQQ I 1 1 1 I I , 1 1 I f 1 1 1 1 I 1 1 1 1 I e e e s I e p 1 e I 1 e e e J e e 9 e I e a r e I e ' 1

I ( ' e e t e I t ' p ' I

• Lower Outer Coll 8800 i Im lower Inner Turn 19 splice side

P.-e.. l ~C\.c( g ~ '>1'creu( 8600

8400

8200

8000

7800

7600

7400

7200

7000

6800

6600

6400

6200

6000 0

• Lower Inner Turn 19 nonsplice side

• Lower Inner Turn 18

• Upper Inner Multipleturn

a Upper Outer Coll

First CooJdown Second CooJdowo Third Cooldown f,'.MGl_ f>rt./~D(

Fourth Cooldown

R~v>t.(.wf.CJ( rip rilll CJ •

l!tJ E 'i Predicted Quench Current

• a ~ "l '<t . Iii A . Elil lt:P r ·JP~ El .....

. . . • • 4:~· K r . Im a 1 . . r ,,,.,,,.... . 4.3 k

~ I . .. • ~

• • I I I j j

. • I I •

- - ------ - -------~------·---- ------ ~ - - - -- • I I 1 • I SSC Operalng Curreot

• • •

• a ;I "i 1; 4.2 Kl ; I •

•i ~ ~ C'! I 3.8 K 4.2 K 4.3 K I C\I 4.3 K 4.2 K 3.8 K 4.2 K

...,.,

I ~ I I I I ,_.. . • I • - T ' • I " • • I ' • • • • I • .. • - I

1 0 20 30 40 50 60 ' 70 80 90 100 11 0 120

Quench Number

Figure 1

..... ..

-• .a --

Long Magnet End Force vs. Displacement

4000 ~~~~--~~~~~~~~-:-~~~-:-~~~---,

I

3000 I I I · ··- --····· ·1············1· · ·········-~---·······

CD 2000 u .. :.

1000

0

0.000 0.010

IS-5SL ql-198

r. s -rr-~ ;...,-

I

I I

I I

---~---······----~----·-·-~---

0.020 0.030 0.040 0.050

Dl1pl•c1ment (In.) ( .5 e,.. ·r 5 C. 't''2. L.J }

Fij""~ ?°

-X-DCA311

- DCA312 (LE·O)

DCA312 (LE-30)

Average

---- DSA311 (unloading)

Aft-er- f=.>c -te v<.S t<:"l

{'v h.iL l.J'l.. f Je .J... ,,,_...\ .

I • I

m c: CD --

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m c: Q) -(,,)

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10/07/91

1 0/09/91

1 0/09/91

10/10/91

10/10/91

0/10/91

0/1 0/91

10/10/91

10/10/91

10/10/91

10/11/91

10/11/91

10/11/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/12/91

10/15/91

1

1

10/15/91

10/15/91

10/16/91

10/17/91

0

,_ : ~ e{ 1- Yi. fo~cE:.. (/!Js)

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~C ARNOLD 11/11/91

IDEAL SJ:ZE 13.386 mCBES POSITION FROM THE COLD MASS CENTERLINE m INCHES

-199 -211 -223 -235 -247 -259 -271 -283 -295

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0.00414 0.00593 0.00507 13.375 13.367 13.378 13.372 13.367 13.38 13.374 13.368 13.38 13.373 13.371 13.383 13.373 13.377 13.381 13 .374 13.375 13.384 13.379 13.378 13.388 13.379 13.383 13.392 13.392 13.38 13.394

MONOUTI;IC PACKS ONLY AI ENDS. • USED ll-IE "TWELVE FOOT STANDARD PACKS

D E CffSET' OFFSEr

0 .0133 0.0076 AVERAGE AVERAGE

13.3727 13.3784 STD DEVIATION STD DEVIATION

0.00606 0.00485 13.369 13.378 13.372 13.377 13.372 13.382 13.374 13.379 13.375 13.379 13.377 13.379 13.381 13.382 13.389 13.392 13.382 13.396

RE

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I I I t I I I I

D LONGITUDINAL MEASUREMENT OF COLD MASS IN INCHES

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Page 2 of 2

P~c.~ \ "'--~ f~c..ToV' q~io

RC ARNOLD 11/11/91

IDEAL SIU: 13.386 INCHES POSI'1'J:ON FRCll '.rBE COLD DBS CEN'l'ERLINE IN INCBES

-199 -211 -223 -235 -247 -259 -271 -283 -295

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0.00159 0.00126 0.00344 0.00169 13.38 13.386 13.3945 13.388 13.379 13.3845 13.3925 13.386 13.378 13.385 13.393 13.386 13.379 13.385 13.393 13.388 13.382 13.385 13.392 13.386 13.38 13.385 13.3915 13.386

13.381 13.385 13.392 13.386 13.382 13.3865 13.392 13.386 13.381 13.384 13.374 13.38

USES TI-iE TWELVE FOOT HIGH-COMPRESSION PACKS

E CffSET

0.0011 AVERAGE

13.3849 STD DEVIATION

0.00192 13.384 13.383 13.3835 13.384

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I I I t I I I f

B LONGITUDINAL MEASUREMENT OF COLD MASS IN INCHES

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Page 2 of 2

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Long 50 mm Dipole Shell Axial Force Change with Excitation

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Distance from return end of yoke (mm)

•= .. -· DCA311 (7050 A)

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7 1328.931 0.1 Qi 0.28! 0.421 ! ! t--~-1•uo.,•.,•1•••"•••• •••••••••00•0000•••••••0001oo•oo•ooooooooo ioo•uu1 .. ouo••••oo oooooooooooooooooooooooi••••~oo oooooootooo•100000 .. ooooooo o•o•ooooo~ouo"ooo• toooooooHooo .. oooonoooooooo• i•••••oooooo ooooooo ooooooooooo oooooooHl••oo••• Hoooooo ooooooooo• ooooooooooooo~ooo o oo o ooooooooo 100 0000000000000 00000

8 2028.44! -0.01! -0.14! 0.01! ! ! 9 ::::::::::::::::::::::::::::::::::::::::~::::::::::::::::::::r::::::::::::::::::::::::::::::::::::::::r::::::::::::::::::::::::::::::::::::::::r::::::::::::::::::::::::::::::: :::::::r::::::::::::::::::::::::::::::::::::c::::::::::::::::::::::::::::::::::r:::::::::::::::::::::::::::::::::::

1 0 i ! i ! . i ! .u ll u ll ll ll 1.I ll li 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

- ------ ------ -1 I Shell Axial Force Gradient

Pr-.1. ~ ........ Q..,..y

2.00-.-~~--....-~~~.,..-~~---.~~~--.-~~~-.-~~----.

0 I 1.50 0 0

* ..... N <l

' er: <l -

1.00--1-~~~-1--~~~+-~~--.~~~--f-~~~-+-~~--i

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0.00--1-~·~~~~~~...-.-.-~...-+-----~-+-...----..-...--+~-.---...-~

0.00 250.00 500.00 750.00 1000.00 1250.00 1500.00

-~

-M-OCA311

+ocA312

~DCA313

Bullets (k 1) She'll (k4)

Co1 l Ends (k2)

Lorentz Force

Shell+ Coils (k3+k4)

Fa.c..t ().. 6/- L.f ('_. k~·.V,~\~.

t ~\. }\ z. {Jr ~ cl. 0(. ~$ 0 ~ 'i 'l.. ,.. V~J.

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Very Simple Spr1ng Model of Coil End Axial Mechanics

Conclusions:

1 ) Variations in average forces . measured by bullet gauges in Fermilab long magnets may be due to differences in bullet loading and/or the chevronning of yoke packs in DCA311.

2) Variations in measured average forces between Fermilab long magnets and Brookhaven long magnets may be due to differences in end pre-loading and/or shell clamping of vertical versus horizontal yokes

3) Variations in bullet measurements of Fermilab short magnets may be due to uneven axial support.